514. [[$x<\frac{1}{5}$]]

515. [[$x<-3$]]

516. [[$x<-1$]]

517. [[$x>0$]]

518. [[$x<\frac{1}{6}$]]

519. [[$x \leq \frac{4}{5}$]]

520. [[$x<\frac{2}{7}$]]

521. [[$a<-8$]]

522. [[$x\geq-4$]]

523. [[$x\leq4$]]

524. [[$x<\frac{21}{22}$]]

525. [[$x<-\frac{3}{4}$]]

526. [[$k\leq -4$]]

527. [[$x \leq -\frac{1}{3}$]]

528. [[$x\geq \frac{3}{\sqrt{7}-4}$]]

529. [[$0 \leq x<\frac{16}{9}$]]

530. [[$-\frac{3}{2}<x \leq \frac{1}{2}$]]

531. [[$x=0$]]

533. [[$2+3x$]]

534. [[$1120$]]

535. [[$30,3 €$]]

536. alle [[$8,75$]] km

537. [[$x>-20(a+1)$]]
[[$a=-\frac{5}{4}$]]

538. [[$-13<k<3$]]

539.
a) [[$\frac{2}{3}<x<4$]]
b) Ei ratkaisua